Cancer of the penis can cause the following symptoms but they can also be due to other medical conditions.

• A growth or sore on your penis that doesn’t heal within 4 weeks can be a symptom of penile cancer. It can look like a wart, ulcer or blister and might not be painful. It is important to know what is normal for you.

Tell you doctor about any changes:

• Bleeding from your penis.
• Bleeding can be a sign of cancer, including from under your foreskin.
• A foul smelling discharge can occur due to an infection or because something is irritating the skin of the penis. It can also be due to not washing often or thoroughly enough. Cancer of the penis is a much less common cause.

If you do not wash your penis every day, a cheese-like substance called smegma can build up. This is different from constant discharge. It is important to see your doctor if you notice something unusual for you.

A rash on your penis

• You may notice that a rash develops on your penis. It is important to be aware of what is normal for you and report any changes to your doctor.
• Difficulty in drawing back your foreskin (phimosis).
• A change in the colour of your penis or foreskin.
• You may see changes to the colour of your penis or foreskin.

Other rarer symptoms

These symptoms can be a sign of a more advanced cancer:

• a lump in the groin
• feeling tired
• abdominal (tummy) pain
• pain in the bones
• loss of weight

You should see your doctor if you have:

• a growth or sore on the penis that doesn’t heal within four weeks
• symptoms that are unusual for you
• symptoms that don’t go away

These symptoms don't always mean you have penile cancer.They may be symptoms of other medical conditions, such as sexually transmitted diseases.

It is not unusual to feel embarrassed or frightened by such symptoms. It is easy to put off going to your doctor. But it is important to get any symptoms checked by a doctor straight away. This means that if you have cancer, you can get it diagnosed and treated early.

https://www.cancerresearchuk.org/about-cancer/penile-cancer/symptoms

Testicular cancer is a growth of cells that starts in the testicles. The testicles are in the scrotum.

Testicular cancer isn’t a common type of cancer. It can happen at any age, but it happens most often between the ages of 15 and 45.

The first sign of testicular cancer often is a bump or lump on a testicle. The cancer cells can grow quickly. They often spread outside the testicle to other parts of the body.

Testicular cancer is treatable, even when it spreads to other parts of the body. Treatments depend on the type of testicular cancer that you have and how far it has spread. Common treatments include surgery and chemotherapy.

Signs and symptoms of testicular cancer include:

• A lump or swelling in either testicle
• A feeling of heaviness in the scrotum
• A dull ache in the lower belly or groin
• Sudden swelling in the scrotum
• Pain or discomfort in a testicle or the scrotum
• Enlargement or tenderness of the breast tissue
• Back pain
• Usually testicular cancer only happens in one testicle

Risk factors

Factors that may increase your risk of testicular cancer include:

• If you have a testicle that never descended, your risk of testicular cancer is higher. The risk is increased even if you've had surgery to move the testicle to the scrotum.
• If testicular cancer runs in your family, you might have an increased risk.
• Testicular cancer can happen at any age. But it's most common in teens and young adults between 15 and 45.
• Testicular cancer is most common in white people.

Prevention

There’s no way to prevent testicular cancer. If you get testicular cancer, there’s nothing you could have done to prevent it.

Testicular cancer screening

Some health care providers recommend regular testicle self-exams. During a testicular self-exam you feel your testicles for any lumps or other changes.

Not all health care providers agree with this recommendation. There’s no research to show that self-exams can lower the risk of dying of testicular cancer. Even when it is found at a late stage, testicular cancer is likely to be cured. 

Still, you might find it helpful to become aware of the usual feel of your testicles. You can do this by doing a testicular self-exam. If you notice any changes that last longer than two weeks, make an appointment with your health care provider.

https://www.mayoclinic.org/diseases-conditions/testicular-cancer-care/symptoms-causes/syc-20352986